Gnathidium
Pronunciation : Gna*thid"i*um
Part of Speech : n.;
Etymology : [NL., fr. Gr. (Zo?l.)
Definition : Defn: The ramus of the lower jaw of a bird as far as it is naked; -- commonly used in the plural.
pl. Gnathidia.
Source : Webster's Unabridged Dictionary, 1913